在LinearLayout中显示CardView的两列

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<androidx.cardview.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="8dp">

    <!-- CardView的内容 -->

</androidx.cardview.widget.CardView>

public class CardAdapter extends RecyclerView.Adapter<CardAdapter.ViewHolder> {

    private List<CardItem> cardItems;

    public CardAdapter(List<CardItem> cardItems) {
        this.cardItems = cardItems;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_item, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        CardItem cardItem = cardItems.get(position);
        // 绑定数据到CardView的视图组件
    }

    @Override
    public int getItemCount() {
        return cardItems.size();
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {

        // CardView的视图组件

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            // 初始化CardView的视图组件
        }
    }
}

RecyclerView recyclerView = findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new GridLayoutManager(this, 2)); // 设置为两列的网格布局
CardAdapter cardAdapter = new CardAdapter(cardItems); // cardItems为CardView的数据列表
recyclerView.setAdapter(cardAdapter);